QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp00021qe
USGS usp00021qe
1 Feb 1984, 07:28
255 km E of Poronaysk, Russia
A magnitude 6.4 mw earthquake at 573.4 km depth.
Published location
Where is 255 km E of Poronaysk, Russia?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
49.063000, 146.590000
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What the numbers mean
Magnitude measures event size; depth locates the source below the surface. Neither value alone establishes local damage or personal risk.
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Use local emergency authorities and the live USGS event page. This historical evidence page is not an alert service.
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Catalog fields and provenance
Event ID
usp00021qe
Coordinates
49.063, 146.59
Network
us
Significance
630